Power actuated valve

A power actuated valve, comprising:

• a valve body;
• a valve member disposed in said valve body;
• a first gear means attached to said valve member;
• a second gear means for drivingly engaging said first gear means to operate said valve;
• moving means for selectively moving said second gear means into and out of engagement with said first gear means;
• power means for driving said second gear means;
• first frame means attached to said moving means, said first frame means being rotatingly connected to said valve body so that said valve body may rotate relative to said frame means;
• and
• locking means for selectively locking said frame means to said valve body prior to operating said valve to prevent said frame means from rotating relative to said valve body.

An actuator for a kelly valve, said valve including a cylindrical vertically oriented valve body having a valve member disposed in said valve body with a first gear attached to said valve member, said valve body being adapted to be attached to a drill string for rotation therewith to provide a means for closing said drill string, said actuator comprising:

• support member means constructed for attachment to said cylindrical valve body for rotation therewith;
• frame means, rotatingly connected to said support member means and constructed to be disposed about said cylindrical valve body so that said cylindrical valve body may rotate within said frame means while said frame means is held stationary;
• a second gear means for drivingly engaging said first gear to operate said valve member;
• moving means, attached to said frame means so as to be held stationary therewith upon rotation of said cylindrical valve body, and operatively associated with said second gear means for selectively moving said second gear means into and out of engagement with said first gear;
• and
• power means, attached to said frame means so as to be held stationary therewith upon rotation of said cylindrical valve body, and operatively associated with said second gear means, for driving said second gear means.

A power actuated kelly valve, comprising:

• a cylindrical valve body adapted to be attached to a drill string for rotation therewith;
• a valve member disposed in said cylindrical valve body;
• a first gear attached to said valve member;
• frame means, disposed about said cylindrical valve body and rotatingly connected thereto so that said cylindrical valve body may rotate within said frame means while said frame means is held stationary;
• a second gear means for drivingly engaging said first gear to operate said valve member;
• moving means, attached to said frame means so as to be held stationary therewith upon rotation of said cylindrical valve body, and operatively associated with said second gear means for selectively moving said second gear means into and out of engagement with said first gear;
• and
• power means, attached to said frame means so as to be held stationary therewith upon rotation of said cylindrical valve body, and operatively associated with said second gear means, for driving said second gear means.